Airplane smoke detection system suitable for enclosed space

Abstract

The invention belongs to the technical field of smoke detection in enclosed space and especially relates to an airplane smoke detection system suitable for enclosed space. According to the invention, an air extractor is used for extracting air from different enclosed spaces on an airplane through pipelines; the extracted air passes through an air filtration unit to remove impurities and foreign matter in the air and retaining smoke particles so as to reduce false-alarm of the system; the filtered air passes through a flow regulator so as to control air flow velocity within the optimum detection range of a smoke detector; the flow-velocity regulated air is conveyed into a detection cavity of the smoke detector through a pipeline; a sensing part is arranged inside the cavity to detect smoke in the air; the air inside the cavity is discharged out of the airplane through another exhaust pipe; and two electric connectors are arranged on the smoke detector. A first electric connector is connected to an airplane power supply; and a second electric connector is connected to an electromechanical management computer through a bus and is used for transmitting alarm, fault and detection information.

Description

technical field [0001] The invention belongs to the technical field of smoke detection in airtight cabins, in particular to an aircraft smoke detection system suitable for airtight cabins. Background technique [0002] Modern aircraft usually use smoke detection systems in areas such as the cockpit, cargo hold, and toilets to detect possible fires. At present, smoke detectors based on photoelectric principles are mainly used on aircraft to detect smoke particles in the air. When the smoke concentration reaches the alarm threshold, the detector sends out an alarm signal to notify the crew members. [0003] At present, most aircraft smoke detection systems are equipped with photoelectric smoke detectors in each area of ​​the aircraft, but the smoke detectors in closed cabins such as toilets, luggage compartments, and electronic equipment cabinets face the following difficulties: 1) Various airtight cabin spaces on board They are very limited, which brings great difficulties t...

AI Technical Summary

Problems solved by technology

[0003] At present, most aircraft smoke detection systems are equipped with photoelectric smoke detectors in each area of ​​the aircraft, but the smoke detectors in closed cabins such as toilets, luggage compartments, and electronic equipment cabinets face the following difficulties: 1) Various airtight cabin spaces on board are very limited, which brings great difficulties to the installation, maintenance and testing of the smoke detection system

2) Photoelectric smoke detectors usually have strict requirements on the airflow velocity in the detection area, while the airflow velocity in cabins with ventilation and cooling requirements such as electronic equipment cabinets is generally higher, and the airflow velocity in luggage compartments and other cabins is generally low, both may Does not meet the requirements

3) Arranging smoke detectors in different areas of the aircraft requires a large number of cables in the cabin for power supply and signal transmission, which will have a certain impact on system reliability and the electromagnetic environment of the aircraft

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